Description: The DEFINE definition cards allow the user to define boxes, coordinate systems, load curves, tables, and orientation vectors for various uses.
Usage:
1. DSI prompts:
> SELECT OPTION
Description: Defines a specific box shaped volume from two corner points specified in global coordinates.
Usage:
1. DSI prompts:
> ENTER COMMAND
CREATE
• This function creates a new box after the user enters a box ID number and defines the two opposing corners using either nodes, points, or xyz coordinates.
DELETE
• This function deletes selected boxes. Boxes can be selected via the following commands: CURSOR AT BOX, KEY IN BOX ID, MULTI-POINT REGION, SELECT ALL BOXES, and WINDOW. Boxes that are selected are displayed in gray. When the user exits the menu, they are deleted.
DISPLAY ON/OFF
• Toggle switch.
LIST
• Lists the box ID numbers in a pop-up window.
MODIFY
• Allows the user to modify a selected box with new point, node, or xyz coordinates. This command also displays the UL coordinates representing the two corners of the box in global coordinates.
RENUMBER
• Renumber the selected box ID numbers or all boxes.
SHOW
• Displays the nodes and elements of a box in white. The box may be selected by cursor pick or by box ID.
VIEW
• Sends the user to the VIEWING OPTIONS MENU.
EXIT
2. When CREATE is selected, DSI prompts:
> ENTER NEW BOX ID. (X) OR E TO EXIT
3. After entering new box ID, DSI prompts:
> DEFINE FIRST CORNER OF THE BOX
4. After selecting the first corner, DSI prompts:
> DEFINE SECOND CORNER OF THE BOX
Refer to the LS-DYNA User's Manual for further description.
Description: This function allows the user to define a local coordinate system using nodes, points, or vectors.
Usage:
1. When CREATE is selected, DSI prompts:
> SELECT LOCAL SYSTEM TYPE
NODES
• Defines a local coordinate system using three nodes.
SYSTEM
• Defines a local coordinate system from a previously defined coordinate system or key entry.
VECTOR
• Uses a vector to define the coordinate system.
• When using the MODIFY function to modify a coordinate system, DSI displays the CSYS DEFINITION CARD after the DEFINE COORDINATE CARD LIST, allowing the user to key in the exact XYZ coordinates of the system.
Description: This function defines a load curve.
Usage:
1. When CURVE is selected, DSI displays the following options:
CREATE
• When CREATE is selected, DSI prompts:
> ENTER DATA (TIME & VALUE) FOR POINT 1 OR END
• At least two points must be defined to create a curve.
• Once the two points are defined, the curve is displayed.
• Refer to the LS-DYNA User's Manual for further description.
DELETE
• Displays DEFINE CURVE CARD LIST and allows user to select and delete curves.
ERASE UNREF. CURVE
• This function allows the user to DELETE either ALL or SELECTED unreferenced curves in a database.
LIST
• Displays the DEFINE CURVE CARD LIST.
MODIFY
• Displays the DEFINE CURVE CARD LIST and the CURVE DEFINITION CARD once a curve has been selected.
READ CURVE
• Displays the ¡°DSI File Dialog¡± window and allows the user to read in a previously saved curve (.cur) file.
RENUMBER
• Renumber the selected load curve or all load curves.
SHOW CURVE
• Displays the DEFINE CURVE CARD LIST with all defined curves. By selecting a listed curve and exiting the list, the curve will be displayed.
Description: The definition card in the SPRING ORIENTATION subsection defines orientation vectors for discrete springs and dampers.
Usage:
1. When CREATE is selected, DSI prompts:
> ENTER NEW VECTOR ID. (X) OR E TO EXIT
2. Once the vector ID has been established, DSI prompts:
> SELECT SPRING ORIENTATION OPTION
• After defining the vector, it is displayed with its vector number in the display window.
Note: Refer to the LS-DYNA User's Manual (Section 9.12) for further description.
Description: The definition card in the TABLE subsection defines a table.
Usage:
1. When CREATE is selected, the TABLE DEFINITION window appears.
Note: Refer to the LS-DYNA User's Manual for further description.
Description: This function defines a vector using the coordinates of two nodes or points
Usage:
1. When CREATE is selected, DSI prompts:
> ENTER NEW VECTOR ID. (X) OR E TO EXIT
2. Once the vector ID has been established, DSI prompts:
> DEFINE TAIL OF VECTOR
3. DSI prompts:
> DEFINE HEAD OF VECTOR
• After defining the vector head, the vector is displayed with its vector number in the display window.
Note: Refer to the LS-DYNA User's Manual for further description.